Chromium-manganese-nitrogen austenitic stainless steel

Abstract

The invention relates to Cr-Mn-N austenite stainless steel. A proper amount of Mn and N are used to substitute expensive nickel to produce a novel Cr-Mn-N steel grade for reducing the cost for materials and maintaining the prior physical property and mechanical property. The Cr-Mn-N austenite stainless steel comprises the following composing elements in percentage by weight: 0.005 to 0.08 percent of carbon element, 0.3 to 0.9 percent of silicon element, 12.1 to 14.8 percent of manganese element, 0.001 to 0.04 percent of phosphorus element, 0.001 to 0.03 percent of sulfur element, 16 to 19 percent of chromium element, 0.5 to 1.8 percent of nickel element, 0.2 to 0.45 percent of nitrogen element, 0.001 to 0.3 percent of molybdenum element, 0.001 to 0.3 percent of copper element, and unavoidable trace elements during most manufacturing processes. The corrosion resistance, the strength and the elongation percentage of the Cr-Mn-N austenite stainless steel in marine atmosphere and acid atmosphere are the same as those of a 304 stainless steel material or are better than those of the 304 stainless steel material, and the Cr-Mn-N austenite stainless steel can reduce the cost for the materials. The Cr-Mn-N austenite stainless steel has the advantages of high elongation percentage, strong corrosion resistance, excellent casting formability and good high-temperature oxidation resistance.

Description

technical field [0001] The present invention relates to an austenitic stainless steel, in particular to an austenitic stainless steel that replaces nickel with manganese and nitrogen, and its corrosion resistance, strength and elongation in marine atmosphere and acidic atmosphere are at the same level or higher than that of 304 stainless steel. It is an austenitic stainless steel with similar properties to 304 stainless steel. Background technique [0002] The common stainless steel has an attractive white luster on the surface and is not easy to rust, so it is widely liked by consumers and is widely used, such as: stainless steel kitchen utensils, water towers, mechanical parts, sporting goods, aerospace materials, medical materials To the 3C industry, etc. There are many kinds of stainless steel, one of the most widely used and the largest amount of stainless steel is 304 stainless steel, its standard composition is 18% chromium plus 8% nickel, commonly known as 18-8 stai...

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Problems solved by technology

In order to solve the above problems, the relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time. This is obviously a problem that the relevant industry is eager to solve.

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